{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:12.764472", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2023-Sep-11_to_2023-Sep-13_21.0_-23.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2023090000286}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "September 11 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 13 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 59526.41253770451}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Botswana", "Namibia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -23.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[19.32, -22.32], [19.47, -21.97], [20.0, -21.75], [20.53, -21.97], [20.68, -22.32], [20.75, -22.35], [21.0, -22.25], [21.25, -22.35], [21.5, -22.25], [21.75, -22.35], [22.0, -22.25], [22.53, -22.47], [22.68, -22.82], [22.75, -22.85], [23.0, -22.75], [23.53, -22.97], [23.75, -23.5], [23.53, -24.03], [23.0, -24.25], [22.75, -24.15], [22.68, -24.18], [22.53, -24.53], [22.0, -24.75], [21.75, -24.65], [21.68, -24.68], [21.53, -25.03], [21.0, -25.25], [20.5, -25.04], [20.0, -25.25], [19.47, -25.03], [19.25, -24.5], [19.38, -24.2], [18.97, -24.03], [18.75, -23.5], [18.85, -23.25], [18.75, -23.0], [18.97, -22.47], [19.32, -22.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -23.0], [18.97, -22.47], [19.32, -22.32], [19.47, -21.97], [20.0, -21.75], [20.53, -21.97], [20.68, -22.32], [20.75, -22.35], [21.0, -22.25], [21.25, -22.35], [21.5, -22.25], [21.75, -22.35], [22.0, -22.25], [22.53, -22.47], [22.68, -22.82], [22.75, -22.85], [23.0, -22.75], [23.53, -22.97], [23.75, -23.5], [23.53, -24.03], [23.0, -24.25], [22.75, -24.15], [22.68, -24.18], [22.53, -24.53], [22.0, -24.75], [21.75, -24.65], [21.68, -24.68], [21.53, -25.03], [21.0, -25.25], [20.5, -25.04], [20.0, -25.25], [19.47, -25.03], [19.25, -24.5], [19.38, -24.2], [18.97, -24.03], [18.75, -23.5], [18.85, -23.25], [18.75, -23.0]]]]}, "2023-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -23.0], [18.97, -22.47], [19.32, -22.32], [19.47, -21.97], [20.0, -21.75], [20.53, -21.97], [20.68, -22.32], [20.75, -22.35], [21.0, -22.25], [21.25, -22.35], [21.5, -22.25], [21.75, -22.35], [22.0, -22.25], [22.53, -22.47], [22.68, -22.82], [22.75, -22.85], [23.0, -22.75], [23.53, -22.97], [23.75, -23.5], [23.53, -24.03], [23.0, -24.25], [22.75, -24.15], [22.68, -24.18], [22.53, -24.53], [22.0, -24.75], [21.75, -24.65], [21.68, -24.68], [21.53, -25.03], [21.0, -25.25], [20.5, -25.04], [20.0, -25.25], [19.47, -25.03], [19.25, -24.5], [19.38, -24.2], [18.97, -24.03], [18.75, -23.5], [18.85, -23.25], [18.75, -23.0]]]]}, "2023-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -23.0], [18.97, -22.47], [19.32, -22.32], [19.47, -21.97], [20.0, -21.75], [20.53, -21.97], [20.68, -22.32], [20.75, -22.35], [21.0, -22.25], [21.25, -22.35], [21.5, -22.25], [21.75, -22.35], [22.0, -22.25], [22.53, -22.47], [22.68, -22.82], [22.75, -22.85], [23.0, -22.75], [23.53, -22.97], [23.75, -23.5], [23.53, -24.03], [23.0, -24.25], [22.75, -24.15], [22.68, -24.18], [22.53, -24.53], [22.0, -24.75], [21.75, -24.65], [21.68, -24.68], [21.53, -25.03], [21.0, -25.25], [20.5, -25.04], [20.0, -25.25], [19.47, -25.03], [19.25, -24.5], [19.38, -24.2], [18.97, -24.03], [18.75, -23.5], [18.85, -23.25], [18.75, -23.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.504536957701816}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.8608516468591825}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.851075919491791, 11.10447974803202, 16.824384844955148]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.695657820514782, 10.3163881515095, 16.296306178732095]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.980918755867278, -10.003213598412618, -4.598422586297651]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.02597188364291, -10.504536957701816, -5.052816315021914]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7110374171601985, -3.0037965616031816, -1.4716700962378377]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1241563096313705, -3.1588711872256585, -1.6967104979116803]}}